Pneumatic tire.



P. BAIN. PNBUMATIC TIRE. APPLICATION FILED MAR. 17, 19131 1,132,99 Patented Mar. 23, 1915.

Aff/

roman BAIN, or LAGRANGE, ILLINOIS, AssIeNon ro IEnEnAL RUBBER. MANUFAC- TUBING COMPANY, or MILWAUKEE, WISCONSIN, A CORPORATION.

PNEUMATIC TIRE..

Specification of Letters Patent.

Patented Marges, 1915.

Application filed March 17, 1913. Serial No. 754,702;

T0 all whom it may concern.'

Be it known that I,- FORE BAIN, a citizen. of the United States, residing at La Grange, in the county of Cook and State of Illinois, have invented'certain new and useful Improvements inl Pneumatic Tires, of which the following is a specification.

My invention relatesto improvements in pneumatic tires for the wheels of vehicles and more especially for automobiles.

One of the objects of my invention is to provide a structure whereby I am enabled to decreasethe cost of construction; toyincrease the stability of the tire, especiallym its capability to resist lateral strains due to thrusts, as when-skidding or .in making short rapid turns around corners; and to increase the durability of the structure to withstand greater wear, by substituting metal side walls, such as steelor the like, for the usual integral side walls of more fragile and shorter lived rubber fabric which forms the outer casing of the tire.

In my improved tire I provide for accommodating tread-displacement by permitting the tread member o f the tire to move inwardly on direct radial lines instead of causing the side walls to move outwardly, or laterally, to permit displacement ofthe tread member due to the imposed load, as in the usual tire casing. Furthermore I arch the tread member transversely, thereby to strengthen it to a great degree and to permit maximum projection from the rim consistent with the quantity of material contained in the tread portion.

In the all-fabric tires heretofore constructed, it is outward or lateral movement that causes constant reoccurrence of flexing of the side walls thereof, which produces granulation of the component materials resulting in side splitting and rim cutting.

In the specific embodiment, which I have chosen to illustrate my invention, for purposes of clear disclosure, Figure 1 is a cross sectional view' of a conventional wheel with my tire attached thereto; and Fig. 2 is a. similar view showing a slight modification of the metal channel and rim..

In both views the same reference characters indicate similar parts.

The felly 5 of the wheel may be of any convenient form or type, supported b spokes 6. A circumferential flat stee tire providing laterally extending flanges.

the

' or band 7 may surround the felly 5 to provlde a wearing surface and to assist in holding Vthe wheel parts together.

As a substitutev for the usual side walls of the fabric outer casing of a tire I provide sheet metal side walls 8 and 49, each curved inwardly at their' mid-parts, as at 10 and '11 respectively, to join said radially placed sidewalls with the rim parts 12 and 13, respectively. The radially extending,lat,

side walls 8 and 9 are each turned inwardly at theirv free circumferential edges, thereby In Fig. 1 the inwardly turned flange parts are transversely curved, as at 14, to provide circumferential channels 15 that confrontthe axis of the wheel. In Fig. 2 the upper circumferential edges of the side walls .are more abruptly inturned, as at 16, and then turned radially, as at 17, thereby to'provide enlarged flange bearingsurfaces to better resist the lateral strain imparted to the'tire'.

The flexible tread member 20 is transversely arched of substantially uniformcross section and is, preferably, composed of the .best sea island fabric having vulcanized rubber properly incorporated there: with. It is provided with radially extending, flat, annular, surfaces 21 and 22 one on each of its respective sides to permit the required inward movement of the tread, within the metal side wall members 8 and 9, as when the wheel strikes a small obstruction in its path and' when it is rotated and carrying an imposed load. Inwardly, from the flat side surfaces21 and 22, and at substantially the transversely circular limits of the tread, at each side, I provide laterally-projecting, circumferentially-extending integral wedge-shaped flanges 23 and 24, respectively, that underlie the respective inwardlyturned flange portions 14-16 of the side walls 8 and 9. The flanges 14-16 prevent the outward radial displacement of the tread member 20 and retain it'against the pressureeffected/by the compressed air within the inner inflatable tube 25. To strengthen the flanges 23-24 I may embed therein several convolutions of flexible metal cable 26. It will be noted, however, that at these edges there is considerable more fabric for a given area than there is near the midportion of the tire, rendering them rela.-

tively stronger.

li have shown one method by which one of the metal side members,as the side meml ber 9-may be removed to displace a dearound the rim, such screw taking through the parts 7 and l2 into or through the telly 5. 'll`he circumferential edge of the rim 12 is undercut, as at 30, to receive the overcut of the companion member 13. Bolts 3l take through the llanges 27 .and 28 and through the elly 5, at intervals aroundthe wheel andare secured in place by nuts 32. When the inner tube is properly yinated it will press the .projecting Hanges 23 and 24e of the 25 tread member into intimate' contact with the side walls 8 and 9 and so maintain them, and the inwardly extending parts 1.4-16 will present outward displacement of the tread member 20. There are no projections or shoulders on either of the parts 8 and 9 to prevent the free inward movement of the tread member 20,'and therefore the tread 20 may move as freely inwardly along the side walls of the members 8 and 9 as would be the case if the side walls were composed of dexible `fabric that extend laterally or bulge niaeeee outwardly to accommodate such inward movement of the tread member.

While l have herein described one ernbodiment ot my invention, .and a slight modification thereof, it is evident that the device is susceptible of further modifications and variations Within the denition and contemplation of the appended claim.

What l claim is:

A pneumatic tire, comprising a relatively deep, metal, channel rim, having parallel side Walls with their circumferential tree edges inturned for engagement with a tread member; a circumferentially-extending resilient tread member, having its mid portion transversely arched, and of substantially uniform cross-section, and having laterally projecting, integral annuli, for engagement with the inturned portions of said rim, said integral annuli being widened out at their outer edges to provide large bearing surfaces against the side walls of said channel rims but of less radial depth than the parallel walls; a plurality of metallic cables disposed in the outer edges of the widened out portions ofthe integral annuli, and an inner'pneumatic tube, which, when indated, holds said annuli in engagement with the sides of the channel rim.

ln testimony whereof l hereunto set my hand in the presence of two witnesses.

Gino 'll`. Mair, Jr., Meer l?, Annen, 

